Data usage opening the Music app?

I've noticed that whenever I open or switch back to the Music app (iPod app) on my iPhone 5, that it appears to be using data. The spinner shows in the status bar. Why does it do this, and how can I stop it? All of the media it should be concerned with is all already on the device, I do not use iCloud or any cloud-based music storage for what I play through the Music app.

I have no idea, but I can only assume that your playlists are synced to iCloud for backup purposes and the music app is syncing with them somehow. I'm only speculating here and have no definitive answer for you.